Brighton and Hove · England
Stanmer External Mastic
Our applicators work in Stanmer on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
Common questions in Stanmer
Do you cover Stanmer for external mastic?
Yes. We work across London and the South East, and Stanmer is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Do you cover smaller places like Stanmer?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
About our external mastic in Stanmer
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement. We work on copings & trims, brickwork movement joints and façade panels, and people most often call us about weeds or debris growing in open joints and failed sealant between panels on a façade.
Older homes in small places like Stanmer may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
All our work is covered by our one-year guarantee.
- Where
- Stanmer (BN1)
- Wider area
- Brighton and Hove
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Stanmer
Also in Stanmer
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Common problems we fix in Stanmer
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
Signs it’s time to call us include:
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Weathered mastic that no longer stretches
- Failed sealant between panels on a façade
Homes close to Stanmer Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- What guarantee comes with the work
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. For a village or hamlet like Stanmer, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Move anything stored near the joints
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
External mastic in Stanmer: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Preston Manor & Gardens (about 2.8 miles south-west) nearby, there’s older building stock in the area around Stanmer as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Coldean Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near Falmer station, outside joints that have cracked can let damp into a rental, so check them between lets.
Stanmer is about 3 miles north-east of Brighton, in Brighton and Hove. Our applicators cover external mastic for homes and businesses in Stanmer, as part of our work across Brighton and Hove. Stanmer is one of 30 places in Brighton and Hove where we work.
All of BN1 is covered for external mastic, from the main roads to the quietest streets. Other places close to Stanmer include Hollingbury (1 mile south-west), Moulsecoomb (2 miles south), Bevendean (2 miles south), Patcham (2 miles west) and Hollingdean (2 miles south-west). We also work in nearby towns such as Brighton (3 miles south-west), Brighton and Hove (4 miles south-west), Hove (4 miles south-west), Carlton Hill (3 miles south), Hanover (3 miles south) and West Hill (3 miles south-west).
Local landmarks in Stanmer
Locally, jobs take us to homes and businesses close to Stanmer Park, University of Sussex Library and Brighton Aldridge Community Academy and the streets around them. For rail, the closest station is Falmer station, about 0.8 miles south-east of the centre. Other landmarks nearby include Clayton Castle (3.4 miles north-west) and Churchill Square (3.7 miles south-west). Open spaces near Stanmer include Ditchling Beacon and Ladies Mile.
Surface by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep soil, plants and ivy away from the joints
- Check external joints each spring
- Keep movement joints as flexible joints, not mortar
- Check the sealant is paintable before painting near it
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
Quotes for external mastic in Stanmer
Jobs vary more than people expect. The main factors:
- Whether the work is at height
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What to tell us for a quote
To make quoting easier, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
If you are in Stanmer and need external mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.